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Seismic response analysis of buried oil and gas pipeline under bidirectional multi-point excitation
https://orcid.org/0000-0002-5182-825X
Abstract Aiming at the seismic response of buried oil and gas pipeline under bidirectional multi-point excitation, the shaking table test of buried oil and gas pipeline under bidirectional multi-point seismic excitation was carried out by using a new layered shear continuum model of soil box and pipeline model. The seismic response law of acceleration and strain of buried oil and gas pipeline under bidirectional multi-point excitation, as well as the response law of soil acceleration and displacement around the pipeline, are clarified through experiments. The results show that: compared with the bidirectional consistent excitation, the curve of soil acceleration amplification coefficient under bidirectional multi-point excitation has a wider fluctuation range, and the soil displacement changes more significantly. The peak acceleration of the pipeline increases with the increase of loading grade and presents a decreasing amplitude and multi-peak phenomenon. The variation law of pipeline strain under bidirectional consistent excitation and bidirectional multi-point excitation is basically the same, showing a trend of large strain in the middle of the pipeline and small strain on both sides, but the strain response of the pipeline under bidirectional multi-point excitation is more prominent. Therefore, the influence of bidirectional multipoint excitation should be considered in seismic response analysis of buried oil and gas pipelines.
Highlights The test uses a new layered shear continuum model of the soil box. Large variation of soil structure under bi-directional multi-point excitation. The amplitude of the pipeline under bi-directional multi-point excitation shows a multi-peak phenomenon. The strain response of the pipeline under bidirectional multi-point excitation is more prominent.
Seismic response analysis of buried oil and gas pipeline under bidirectional multi-point excitation
https://orcid.org/0000-0002-5182-825X
Abstract Aiming at the seismic response of buried oil and gas pipeline under bidirectional multi-point excitation, the shaking table test of buried oil and gas pipeline under bidirectional multi-point seismic excitation was carried out by using a new layered shear continuum model of soil box and pipeline model. The seismic response law of acceleration and strain of buried oil and gas pipeline under bidirectional multi-point excitation, as well as the response law of soil acceleration and displacement around the pipeline, are clarified through experiments. The results show that: compared with the bidirectional consistent excitation, the curve of soil acceleration amplification coefficient under bidirectional multi-point excitation has a wider fluctuation range, and the soil displacement changes more significantly. The peak acceleration of the pipeline increases with the increase of loading grade and presents a decreasing amplitude and multi-peak phenomenon. The variation law of pipeline strain under bidirectional consistent excitation and bidirectional multi-point excitation is basically the same, showing a trend of large strain in the middle of the pipeline and small strain on both sides, but the strain response of the pipeline under bidirectional multi-point excitation is more prominent. Therefore, the influence of bidirectional multipoint excitation should be considered in seismic response analysis of buried oil and gas pipelines.
Highlights The test uses a new layered shear continuum model of the soil box. Large variation of soil structure under bi-directional multi-point excitation. The amplitude of the pipeline under bi-directional multi-point excitation shows a multi-peak phenomenon. The strain response of the pipeline under bidirectional multi-point excitation is more prominent.
Seismic response analysis of buried oil and gas pipeline under bidirectional multi-point excitation
https://orcid.org/0000-0002-5182-825X
Abstract Aiming at the seismic response of buried oil and gas pipeline under bidirectional multi-point excitation, the shaking table test of buried oil and gas pipeline under bidirectional multi-point seismic excitation was carried out by using a new layered shear continuum model of soil box and pipeline model. The seismic response law of acceleration and strain of buried oil and gas pipeline under bidirectional multi-point excitation, as well as the response law of soil acceleration and displacement around the pipeline, are clarified through experiments. The results show that: compared with the bidirectional consistent excitation, the curve of soil acceleration amplification coefficient under bidirectional multi-point excitation has a wider fluctuation range, and the soil displacement changes more significantly. The peak acceleration of the pipeline increases with the increase of loading grade and presents a decreasing amplitude and multi-peak phenomenon. The variation law of pipeline strain under bidirectional consistent excitation and bidirectional multi-point excitation is basically the same, showing a trend of large strain in the middle of the pipeline and small strain on both sides, but the strain response of the pipeline under bidirectional multi-point excitation is more prominent. Therefore, the influence of bidirectional multipoint excitation should be considered in seismic response analysis of buried oil and gas pipelines.
Highlights The test uses a new layered shear continuum model of the soil box. Large variation of soil structure under bi-directional multi-point excitation. The amplitude of the pipeline under bi-directional multi-point excitation shows a multi-peak phenomenon. The strain response of the pipeline under bidirectional multi-point excitation is more prominent.
Seismic response analysis of buried oil and gas pipeline under bidirectional multi-point excitation
Dai, Jianbo (author) / Wang, Zhaocheng (author) / Wang, Zhiqiang (author) / Wang, Li (author)
2022-07-22
Article (Journal)
Electronic Resource
English
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